/* ---
Root Variables & Base Configuration
--- */
:root {
  --font-family-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial,
    sans-serif;
  --font-family-mono: "SF Mono", Monaco, Consolas, "Courier New", monospace;

  /* Colors */
  --color-text: #212529;
  --color-text-muted: #555555;
  --color-background: #ffffff;
  --color-border: #dee2e6;
  --color-link: #0056b3;
  --color-link-visited: #551a8b;
  --color-accent-bg: #eef5ff;
  --color-accent-text: #0056b3;
  --color-accent-bg-hover: #dbe9f9;
  --color-mark-bg: #fff3cd;
  --color-pill-bg: #f1f3f5;
  --color-pill-text: #495057;
  --color-pill-bg-hover: #e9ecef;

  /* Layout */
  --content-max-width: 48rem;
  --nav-max-width: 60rem;
  --nav-height: 3.5rem;
  --header-footer-height: 3.5rem; /* New variable for consistent height */
  --border-radius: 4px;
  --spacing-unit: 0.5rem;
}

/* ---
Global Resets & Base Styles
--- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  padding-top: var(--header-footer-height);
  font-family: var(--font-family-sans);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--color-text);
  background-color: var(--color-background);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.body-container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.main-content {
  flex: 1;
  width: 100%;
  max-width: var(--content-max-width);
  margin: calc(var(--spacing-unit) * 5) auto 0;
  padding: 0 calc(var(--spacing-unit) * 3);
}

/* ---
Typography & Core Links
--- */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 700;
  line-height: 1.3;
  margin: 0;
  color: var(--color-text);
}

a {
  color: var(--color-link);
  text-decoration: none;
}
a:visited {
  color: var(--color-link-visited);
}
a:hover {
  text-decoration: underline;
}
a:active {
  color: var(--color-link);
}
a:visited:active {
  color: var(--color-link-visited);
}

.page-header {
  margin-bottom: calc(var(--spacing-unit) * 5);
}
.page-header h1 {
  font-size: 2rem;
  margin-bottom: var(--spacing-unit);
}
.page-description {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  max-width: 55ch;
}

/* ---
Navigation
--- */
.roark-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-footer-height);
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  display: flex;
  justify-content: center;
  padding: 0 calc(var(--spacing-unit) * 3);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  max-width: var(--nav-max-width);
}

.nav-left,
.nav-right {
  display: flex;
  align-items: center;
  flex: 1;
}
.nav-left {
  gap: calc(var(--spacing-unit) * 3);
}
.nav-right {
  justify-content: flex-end;
}
.nav-center {
  flex: 0 1 auto;
  padding: 0 calc(var(--spacing-unit) * 4);
}

/* Mobile nav elements - hidden on desktop */
.nav-mobile-left,
.nav-mobile-right,
.nav-mobile-menu {
  display: none;
}

/* Standard link pattern - consolidated */
.nav-left a,
.nav-center a,
.post-title a,
.archive-link,
.tag-list a,
.search-result-title a,
.read-more {
  color: var(--color-text);
  text-decoration: none;
}
.nav-left a:visited,
.nav-center a:visited,
.post-title a:visited,
.archive-link:visited,
.tag-list a:visited,
.search-result-title a:visited,
.read-more:visited {
  color: var(--color-text);
}
.nav-left a:hover,
.nav-center a:hover,
.post-title a:hover,
.archive-link:hover,
.tag-list a:hover,
.search-result-title a:hover,
.read-more:hover {
  color: var(--color-link);
  text-decoration: underline;
}
.nav-left a:visited:hover,
.nav-center a:visited:hover,
.post-title a:visited:hover,
.archive-link:visited:hover,
.tag-list a:visited:hover,
.search-result-title a:visited:hover,
.read-more:visited:hover {
  color: var(--color-link-visited);
  text-decoration: underline;
}

.nav-left a {
  font-weight: 500;
}

.nav-center a.site-title {
  font-weight: 700;
  font-size: 1.6rem;
}

.nav-right input[type="search"] {
  font-family: inherit;
  font-size: 0.9rem;
  padding: calc(var(--spacing-unit) * 0.8) calc(var(--spacing-unit) * 1.2);
  border: 1px solid #ced4da;
  border-radius: var(--border-radius);
  width: 18rem;
  transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}
.nav-right input[type="search"]:focus {
  border-color: #86b7fe;
  outline: 0;
  box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
}

/* ---
Post Lists - Base styles
--- */
.post-list,
.post-list-compact,
.post-list-tag,
.archive-list,
.search-results-list,
.tag-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.post-item {
  margin-bottom: calc(var(--spacing-unit) * 7);
  padding-bottom: calc(var(--spacing-unit) * 5);
  border-bottom: 1px solid #f1f3f5;
}
.post-item:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

/* Compact variant */
.post-list-compact .post-item {
  margin-bottom: calc(var(--spacing-unit) * 3);
  padding-bottom: 0;
  border-bottom: none;
}

/* Tag page variant */
.post-list-tag .post-item {
  margin-bottom: calc(var(--spacing-unit) * 5);
  padding-bottom: calc(var(--spacing-unit) * 4);
}

.post-title {
  font-size: 1.75rem;
  margin-bottom: calc(var(--spacing-unit) * 0.5);
}
.post-list-compact .post-title {
  font-size: 1.2rem;
}
.post-list-tag .post-title {
  font-size: 1.4rem;
}
.search-result-title {
  font-size: 1.2rem;
  margin-bottom: calc(var(--spacing-unit) * 0.5);
}
.search-result-title a {
  font-weight: 600;
}

.post-meta {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-bottom: calc(var(--spacing-unit) * 1.5);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--spacing-unit) calc(var(--spacing-unit) * 2);
}

.post-summary p,
.post-excerpt p {
  margin-top: 0;
  margin-bottom: 1rem;
}

.read-more {
  font-size: 0.9rem;
}

.search-result-snippet {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-top: var(--spacing-unit);
  line-height: 1.5;
}

/* ---
Tag Pills
--- */
.post-tags,
.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-unit);
}

.post-tags a,
.tag-pill {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-pill-text);
  background-color: var(--color-pill-bg);
  padding: calc(var(--spacing-unit) * 0.4) calc(var(--spacing-unit) * 1.5);
  border-radius: 1rem;
  text-decoration: none;
  transition: background-color 0.15s ease-in-out, color 0.15s ease-in-out;
}

.post-tags a:visited,
.tag-pill:visited {
  color: var(--color-pill-text);
  background-color: var(--color-pill-bg);
}

.post-tags a:hover,
.tag-pill:hover {
  color: var(--color-link);
  background-color: var(--color-pill-bg-hover);
  text-decoration: underline;
}
.post-tags a:visited:hover,
.tag-pill:visited:hover {
  color: var(--color-link-visited);
  background-color: var(--color-pill-bg-hover);
  text-decoration: underline;
}

.tag-cloud {
  margin-top: calc(var(--spacing-unit) * 2);
  gap: calc(var(--spacing-unit) * 1.5);
}
.tag-pill {
  font-size: 1rem;
  padding: calc(var(--spacing-unit) * 0.8) calc(var(--spacing-unit) * 2);
}
.tag-pill span {
  color: var(--color-text-muted);
  font-size: 0.9em;
  margin-left: calc(var(--spacing-unit) * 0.5);
}

/* ---
Archive & Lists
--- */
.archive-year-group {
  margin-bottom: calc(var(--spacing-unit) * 4);
}
.archive-year {
  font-size: 1.5rem;
  margin: calc(var(--spacing-unit) * 4) 0 var(--spacing-unit);
  padding-bottom: var(--spacing-unit);
  border-bottom: 1px solid var(--color-border);
}
.archive-year:first-of-type {
  margin-top: 0;
}
.archive-month {
  font-size: 1.2rem;
  margin: calc(var(--spacing-unit) * 3) 0 calc(var(--spacing-unit) * 2);
}

.archive-list li {
  display: flex;
  justify-content: space-between;
  gap: calc(var(--spacing-unit) * 2);
  margin-bottom: var(--spacing-unit);
}
.archive-list time,
.archive-date {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  white-space: nowrap;
}

/* Tag list page */
.tag-list {
  display: flex;
  flex-direction: column;
  gap: calc(var(--spacing-unit) * 1.5);
}
.tag-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: calc(var(--spacing-unit) * 1.5) calc(var(--spacing-unit) * 2);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  transition: background-color 0.15s ease-in-out;
}
.tag-list li:hover {
  background-color: #f8f9fa;
}
.tag-list a {
  font-weight: 500;
  flex-grow: 1;
}

/* ---
Single Post
--- */
.post .post-header {
  margin-bottom: calc(var(--spacing-unit) * 4);
  padding-bottom: calc(var(--spacing-unit) * 3);
  border-bottom: 1px solid var(--color-border);
}
.post .post-title {
  font-size: 2.25rem;
  margin-bottom: calc(var(--spacing-unit) * 2);
}
.post .post-meta {
  font-size: 1rem;
}
.post-content {
  font-size: 1.1rem;
  line-height: 1.7;
}
.post-content h2,
.post-content h3 {
  margin: 2.5em 0 1em;
}
.post-content p {
  margin: 0 0 1.25em;
}
.post-content a {
  text-decoration: none;
}
.post-content a:visited {
  color: var(--color-link-visited);
}
.post-content a:hover {
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

/* ---
Search
--- */
.search-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s ease;
}
.search-overlay.is-active {
  opacity: 1;
  visibility: visible;
}
.search-overlay-content {
  width: 90%;
  max-width: 40rem;
}
.search-overlay-input {
  width: 100%;
  font-size: 1.5rem;
  padding: var(--spacing-unit) 0;
  border: none;
  border-bottom: 2px solid var(--color-text);
  background: transparent;
  outline: none;
  color: var(--color-text);
}
.search-overlay-input:focus {
  border-bottom-color: var(--color-link);
}
.search-overlay-input::placeholder {
  color: var(--color-text-muted);
}
.search-overlay-close {
  position: absolute;
  top: calc(var(--spacing-unit) * 3);
  right: calc(var(--spacing-unit) * 3);
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-unit);
}

.search-section {
  margin-top: calc(var(--spacing-unit) * 3);
}
.search-placeholder,
.search-loading,
.search-error {
  text-align: center;
  color: var(--color-text-muted);
  font-style: italic;
  padding: calc(var(--spacing-unit) * 4) 0;
}
.search-count {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin-bottom: calc(var(--spacing-unit) * 3);
  padding-bottom: calc(var(--spacing-unit) * 2);
  border-bottom: 1px solid var(--color-border);
}
.search-no-results {
  text-align: center;
  padding: calc(var(--spacing-unit) * 4) 0;
}
.search-no-results p:first-child {
  color: var(--color-text-muted);
  font-size: 1.1rem;
  margin-bottom: calc(var(--spacing-unit) * 2);
}

/* ---
Pagination
--- */
.pagination {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: calc(var(--spacing-unit) * 8);
  padding-top: calc(var(--spacing-unit) * 3);
  border-top: 1px solid var(--color-border);
  font-size: 0.9rem;
}
.pagination-link {
  color: var(--color-text);
  text-decoration: none;
  font-weight: 500;
}
.pagination-link:visited {
  color: var(--color-text);
}
.pagination-link:hover {
  color: var(--color-link);
  text-decoration: underline;
}
.pagination-link:visited:hover {
  color: var(--color-link-visited);
  text-decoration: underline;
}
.pagination-link-disabled {
  color: #adb5bd;
  cursor: not-allowed;
  font-weight: 500;
  text-decoration: none;
}
.pagination-current {
  display: none;
}

/* ---
Footer
--- */
.site-footer {
  margin-top: calc(var(--spacing-unit) * 8);
  height: var(--header-footer-height);
  padding: 0 calc(var(--spacing-unit) * 3);
  border-top: 1px solid var(--color-border);
  text-align: center;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ---
Utilities
--- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  background: var(--color-link);
  color: white;
  padding: var(--spacing-unit) calc(var(--spacing-unit) * 2);
  z-index: 1100;
  transition: top 0.2s ease-in-out;
  text-decoration: none;
  border-radius: var(--border-radius);
}
.skip-link:focus {
  top: 1rem;
}

mark {
  background-color: var(--color-mark-bg);
  color: var(--color-text);
  padding: 2px;
  border-radius: 2px;
}

/* ---
Mobile Overrides
--- */
@media (max-width: 768px) {
  body {
    padding-top: 0;
  }

  .roark-nav {
    position: static;
    padding: calc(var(--spacing-unit) * 2);
    height: auto;
    border-bottom: 1px solid var(--color-border);
  }

  .nav-container {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    width: 100%;
  }

  /* Hide desktop, show mobile nav elements */
  .nav-left,
  .nav-right {
    display: none;
  }
  .nav-mobile-left,
  .nav-mobile-right {
    display: flex;
    align-items: center;
  }
  .nav-center {
    padding: 0;
    flex-grow: 1;
    text-align: center;
  }

  /* Mobile buttons */
  .hamburger-button,
  .search-icon-button {
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-unit);
    width: 44px;
    height: 44px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    color: var(--color-text);
  }
  .hamburger-button .bar {
    width: 22px;
    height: 2px;
    background-color: var(--color-text);
    transition: transform 0.2s ease, opacity 0.2s ease;
  }
  .hamburger-button.is-active .bar1 {
    transform: translateY(7px) rotate(45deg);
  }
  .hamburger-button.is-active .bar2 {
    opacity: 0;
  }
  .hamburger-button.is-active .bar3 {
    transform: translateY(-7px) rotate(-45deg);
  }

  /* Focus states */
  .hamburger-button:focus,
  .search-icon-button:focus,
  .search-overlay-close:focus {
    outline: 2px solid var(--color-link);
    outline-offset: 2px;
    border-radius: var(--border-radius);
  }

  /* Mobile menu */
  .nav-mobile-menu {
    display: none;
    flex-direction: column;
    width: 100%;
    background-color: var(--color-background);
    position: absolute;
    top: 59px;
    left: 0;
    right: 0;
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-unit) 0;
    z-index: 1000;
  }
  .nav-mobile-menu.is-open {
    display: flex;
  }
  .nav-mobile-menu a {
    color: var(--color-text);
    text-decoration: none;
    padding: calc(var(--spacing-unit) * 1.5) calc(var(--spacing-unit) * 3);
    text-align: center;
    font-size: 1.1rem;
    border-bottom: 1px solid #f1f3f5;
  }
  .nav-mobile-menu a:visited {
    color: var(--color-text);
  }
  .nav-mobile-menu a:hover {
    color: var(--color-link);
    text-decoration: underline;
  }
  .nav-mobile-menu a:visited:hover {
    color: var(--color-link-visited);
    text-decoration: underline;
  }
  .nav-mobile-menu a:last-child {
    border-bottom: none;
  }

  .main-content {
    margin-top: calc(var(--spacing-unit) * 4);
  }

  /* Consolidated mobile tap states */
  .nav-left a:active,
  .nav-center a:active,
  .post-title a:active,
  .archive-link:active,
  .tag-list a:active,
  .search-result-title a:active,
  .read-more:active,
  .nav-mobile-menu a:active,
  .pagination-link:active,
  .post-content a:active {
    color: var(--color-link) !important;
    text-decoration: underline !important;
  }

  .nav-left a:visited:active,
  .nav-center a:visited:active,
  .post-title a:visited:active,
  .archive-link:visited:active,
  .tag-list a:visited:active,
  .search-result-title a:visited:active,
  .read-more:visited:active,
  .nav-mobile-menu a:visited:active,
  .pagination-link:visited:active,
  .post-content a:visited:active {
    color: var(--color-link-visited) !important;
    text-decoration: underline !important;
  }

  /* Special cases that need background changes */
  .nav-mobile-menu a:active,
  .pagination-link:active,
  .archive-link:active {
    background-color: #f8f9fa !important;
  }
  .nav-mobile-menu a:visited:active,
  .pagination-link:visited:active,
  .archive-link:visited:active {
    background-color: #f8f9fa !important;
  }

  /* Tag pills - remove transitions and apply consistent behavior */
  .post-tags a,
  .tag-pill {
    transition: none !important;
  }
  .post-tags a:active,
  .tag-pill:active {
    color: var(--color-link) !important;
    text-decoration: underline !important;
    background-color: var(--color-pill-bg) !important;
  }
  .post-tags a:visited:active,
  .tag-pill:visited:active {
    color: var(--color-link-visited) !important;
    text-decoration: underline !important;
    background-color: var(--color-pill-bg) !important;
  }

  /* Tap highlight */
  a,
  .hamburger-button,
  .search-icon-button {
    -webkit-tap-highlight-color: rgba(0, 86, 179, 0.2);
    tap-highlight-color: rgba(0, 86, 179, 0.2);
  }

  .nav-center a.site-title {
    font-size: 1.5rem;
  }
}